Retina

A retina is the light-sensitive layer at the back of your eye. It helps you see by receiving light and sending information to your brain through the optic nerve. Light enters your eye and passes through the lens, which focuses it onto the retina. Cells in the retina called rods and cones change the light into electrical signals. The retina sends these signals along the optic nerve to the brain, which interprets them as the images you see. So, the retina helps us see by turning light into an electrical signal that our brain can understand.